Inter-pole Drive Bar for Compact Switchgear Pole Arrangement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing load interruption switchgear with multiple poles is wide and occupies significant floor space due to the side-by-side arrangement of poles and the need for a rotatable crank with drive links to move conductive blades between closed and open positions.
Innovation Solution
An inter-pole drive bar that extends among multiple poles, featuring an elongated linkage element with connection points and design features like indentations and strengthening lugs to avoid engagement with switch apparatus structures, allowing parallel and perpendicular translation for simultaneous movement of poles between closed and open positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple poles are arranged side-by-side with a rotatable crank and drive links, then the poles can be moved simultaneously between closed and open positions, but the switchgear occupies significant floor space
Solution Approach 1:
The patent transitions from a horizontal side-by-side arrangement of poles to a vertical stacked arrangement. The drive bar is repositioned from a horizontal orientation above the poles to a vertical orientation alongside the poles, utilizing the vertical dimension to reduce horizontal floor space occupation while maintaining simultaneous pole operation capability
2Area of stationary object
If the drive bar is positioned close to the poles, then the overall width is reduced, but the drive bar may engage or interfere with other switch apparatus structures
Solution Approach 1:
The drive bar incorporates localized cutouts at specific positions along its length. These cutouts create local voids that allow the drive bar to pass close to or alongside other switch apparatus structures without causing engagement or interference, enabling compact positioning while avoiding harmful interactions
3Object-affected harmful factors
If material is removed from the drive bar to create cutouts, then interference with other structures is avoided, but the drive bar's mechanical strength may be compromised
Solution Approach 1:
The drive bar features localized cutouts positioned strategically to avoid high-stress regions. The cutouts are designed with specific geometries and placements that remove material only where necessary to clear other structures, while preserving the structural integrity and mechanical strength of the drive bar in critical load-bearing areas
Data Source
AI summary
An inter-pole drive bar in accordance with the disclosed and claimed concept is usable to extend among a plurality of poles of an improved switch apparatus and to cause the plurality of poles to be together moved between a CLOSED position and an OPEN position. The inter-pole drive bar is elongated and has a plurality of connection points that are connectable with the poles and further includes a number of features that avoid engagement or other interference between the inter-pole drive bar and the various structures of the switch apparatus. The inter-pole drive bar includes an elongated linkage element whose movement between the CLOSED and OPEN positions of the switch apparatus are primarily translation of the linkage element in a direction generally parallel with its longitudinal extent and translation of the linkage element in a direction generally perpendicular to its longitudinal extent.